What is the epic song of a group?


I will start. I vote for Stairway to Heaven for Zep. Its grand with a great finish. I will throw in Salisbury by Uriah Heap. Ok lets see some posts of what you think is a groups masterpiece.
128x128blueranger

 Hendrix   " Voodoo Child (Slight Return)"
(Originally titled "Voodoo Chile (Slight Return)" on UK Track release)
Someone mentioned You Really Got Me for the Kinks.  I would say that was their iconic song, but I think their "epic" would be Waterloo Sunset.
Regarding Jimi Hendrix, I will have to disagree and say 1983 (a Merman I should turn to be).
For Hendrix it would have to be "Third Stone from the Sun. Starts out slow and easy. Then builds to an epic feedback solo.